The present work supposes the prolongation of Therapy Gestalt (Herder) in which the author introduced the basic concepts of this therapy and included some applications focused mainly on the therapeutic encounter at individual level. Here Castanedo delves into the theoretical roots of Gestalt and individual psychotherapy, while emphasizing group gestural interventions. All this is the professional product of years of participation in congresses, courses and conferences, as well as in Workshops, both therapeutic and training, in different countries and institutions. This fourth edition, revised and expanded, includes, among other information, a new chapter dedicated to the supervision of therapists in gestalt formation.